doc: replace quickstart leanpkg info with info about lake

doc/dev/index.md

@@ -63,6 +63,7 @@ cd src
 # make `lean` etc. point to stage0 anywhere inside `src`
 elan override set lean4-stage0
 ```
+
 You can also use the `+toolchain` shorthand (e.g. `lean +lean4-debug`) to switch
 toolchains on the spot. `lean4-mode` will automatically use the `lean` executable
 associated with the directory of the current file as long as `lean4-rootdir` is

doc/make/msys2.md

@@ -74,6 +74,11 @@ The following linux command will do that:
 cp $(ldd lean.exe | cut -f3 -d' ' | grep mingw) .
 ```
 
+However, if you plan to use this build to compile lean programs
+to executable binaries using `lake build` in normal Windows command
+prompt outside of msys2 environment you will also need to add a windows
+version clang to your path.
+
 ## Trouble shooting
 
 **-bash: gcc: command not found**

doc/quickstart.md

@@ -3,33 +3,48 @@
 These instructions will walk you through setting up Lean using the "basic" setup and VS Code as the editor.
 See [Setup](./setup.md) for other ways and more details on setting up Lean.
 
-1. Install the latest Lean 4 nightly through [`elan`](https://github.com/leanprover/elan): in any bash-compatible shell, run
-    ```sh
-    curl https://raw.githubusercontent.com/leanprover/elan/master/elan-init.sh -sSf | sh -s -- --default-toolchain leanprover/lean4:nightly
-    ```
-    On Windows, instead run in `cmd`
-    ```sh
-    curl -O --location https://raw.githubusercontent.com/leanprover/elan/master/elan-init.ps1
-    powershell -f elan-init.ps1 --default-toolchain leanprover/lean4:nightly
-    del elan-init.ps1
-    ```
-    See the [elan repo](https://github.com/leanprover/elan) for other installation options and details.
-    
 1. Install [VS Code](https://code.visualstudio.com/).
 
-1. Open VS Code and install the `lean4` extension.
+1. Launch VS Code and install the `lean4` extension.
 
     ![installing the vscode-lean4 extension](images/code-ext.png)
 
-1. Create a new file with the extension `.lean` and add the following code:
+1. Create a new file using  "File > New File" and click the `Select a language` link and type in `lean4` and hit ENTER.  You should see the following popup:
+    ![elan](images/install_elan.png)
+
+    Click the "Install Lean using Elan" link and follow the progress
+    pressing ENTER in the terminal window to install lean.  You should see some progress output like this:
+
+    ```
+    info: syncing channel updates for 'nightly'
+    info: latest update on nightly, lean version nightly-2021-12-05
+    info: downloading component 'lean'
+    ```
+
+1. While it is installing you can paste the following Lean program into the new file:
+
     ```lean
     #eval Lean.versionString
     ```
-    You should get a syntax-highlighted file with a "Lean Infoview" on the right that tells you the installed Lean version when placing your cursor on the last line.
+
+    When the install finishes the Lean Language Server should start automatically and you should get a syntax-highlighting and a "Lean Infoview" popping up on the right.  You will see the output of the #eval statement when
+    you place your cursor at the end of the #eval statement.
 
     ![successful setup](images/code-success.png)
 
-1. You are set up! You can now also run `lake init foo` from the command line to create a package, followed by `lake build` to get an executable version of your Lean program.
+You are set up!
+
+## Create a Lean Project
+
+You can now create a Lean project in a new folder. Run `lake init foo` from the "View > Terminal" to create a package, followed by `lake build` to get an executable version of your Lean program.
+On Linux/macOS, you first have to follow the instructions printed by the Lean installation or log out and in again for the Lean executables to be available in you terminal.
 
 Note: Packages **have** to be opened using "File > Open Folder..." for imports to work.
 Saved changes are visible in other files after running "Lean 4: Refresh File Dependencies" (`Ctrl+Shift+X`).
+
+## Troubleshooting
+
+**The InfoView says "Waiting for Lean server to start..." forever.**
+
+Check that the VS Code Terminal is not prompting you with `Press ENTER key to start Lean:`.  If so click in the terminal window and pressthe  ENTER key.
+If that doesn't work try also running the VS Code command `Developer: Reload Window`.